NKK Switch EB2085-BA

09/07/2020

Comprehensive classification knowledge of air compressors

Classification of air compressors Air compressors are divided into: 　　1, speed type; 　　2, volumetric type; volumetric type is divided into rotary and reciprocating;

09/17/2025

Common Faults and Troubleshooting of Gear Pumps

Gear oil pump can be used as oil transfer pump, lubricating pump, booster pump, and fuel pump, suitable for hydraulic systems of machine tools

06/14/2020

Danfoss cocuses on providing energy efficient, sustainable and smart refrigeration compressors for a varied range of commercial applications such as cold rooms

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. 　　Here are two formulas involved: 　　①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. 　　② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. 　　 So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. 　　 Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 　　 2. Leakage 　　During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. 　　Why does the electric leakage cause the MCB to trip? There are two situations. 　　 ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. 　　②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. 　　How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. 　　 ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. 　　②Measure whether the output current exceeds the standard. 　　 So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.

08/24/2020

What to do if the compressor of screw chiller is damaged

The compressor is the core component of the chiller. Damage to the compressor is a very serious fault and needs to be dealt with in time, otherwise the chiller will not work.

09/16/2020

Analysis of Frequency Conversion Technology in the Application of Air Compressor System

1. Operation principle and analysis of air compressor　　 As far as okmarts.com is concerned, the main equipment currently being renovated is basically a traditional screw air compressor. The air compressor is a load with a large moment of inertia.

07/23/2020

Share┃Causes and solutions for ice block, dirty block, and oil block

Foreword: The blockage of the refrigeration system is mainly caused by the ice blockage, dirty blockage or oil blockage of the capillary tube, or the dirty blockage of the dryer filter.

08/20/2020

Understand the knowledge of quick-freezing cold storage to solve all the incurable diseases of quick-freezing cold storage

Quick-freezing cold storage refers to a method in which food quickly passes through its largest ice crystal formation area and freezes quickly when the average temperature reaches -18°C. The temperature of quick-freezer is usually -15℃～-35℃.

06/18/2020

Analysis of the circuit diagram of the two compressors' phase failure protection

Analysis of the circuit diagram of the two compressors' phase failure <br><br> Air compressor phase failure <br><br> circuit In the figure, KP is the electrical contact pressure gauge Ai is the CD4073 AND gate circuit, Az is the ~D4025 NOR gate circuit, and A3 is the CD4071 OR gate circuit. The 7806 three-terminal fixed integrated voltage regulator is used as the control circuit for the DC working power supply. When the AC power fails, the relay KA is released and the motor stops. Circuit diagram of compressor phase failure <br><br><img src="{{media url=&quot;wysiwyg/Analysis_of_the_circuit_diagram_of_the_two_compressors_phase_failure_protection.jpg&quot;}}" alt="" />

01/09/2021

Common failures and maintenance methods of industrial dehumidifiers

What are the common failures of industrial dehumidifiers? How do industrial dehumidifiers repair these faults? Or as a technician, you usually deal with these common faults. This article will talk to you about the common faults and maintenance methods of 器2䀀
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